6、27+8点72+3点73+1点二八,用简便的方法计算?

2025-03-24 13:13:15
推荐回答(2个)
回答1:

交换律,结合律
27+8.72+3.73+1.28
=(27+3.73)+(8.72+1.28)
=30.73+10
=40.73

回答2:

=(6.27+3.73)+(8.72+1.28)
=10+10
=20